To prepare the marinade, mix together the vegetable powder, smoked paprika, lemon juice and olive oil. Divide the marinade in 2 separate bowls and add the prawns and beef strips separately in each bowl. Let them marinate for at least 15 minutes.

To make the guacamole, mash the avocados in a bowl, add the remaining ingredients and mix. Add salt and pepper to taste.

Heat a large frying pan and add the prawns. Cook for 1 minute on each side until cooked. Remove and place in a plate. Wipe the pan clean and add the beef strips. Cook for 4-5 minutes until the meat is cooked.

To assemble, take a taco, add a tablespoon of guacamole and top with prawns or beef strips. Add a squeeze of lemon and a few coriander leaves and serve.